Description

Test for finite value.

Notes

If an implementation extends this specification to support IEEE-754 flags or
exceptions, then all built-in relational functions shall proceed without raising the
invalid floating-point exception when one or more of the operands
are NaNs.

The built-in relational functions are extended with
cl_khr_fp16 to
include appropriate versions of functions that take half, and
half{2|3|4|8|16} as arguments and return values.

The function returns a 0 if the specified relation is false and a 1
if the specified relation is true for scalar argument types. These
functions shall return a 0 if the specified relation is false and a -
1 (i.e. all bits set) if the specified relation is true for vector
argument types.